Letters to the Editor Humans Letters from the April 15, 2006, issue of Science News By Science News April 11, 2006 at 7:09 pm - More than 2 years ago Share this:Share Share via email (Opens in new window) Email Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Print (Opens in new window) Print Light shift Regarding “Blasts from the Past: Astronomers begin to go the distance with gamma-ray bursts” (SN: 2/11/06, p. 88), why is it that visible light is shifted to lower frequencies but gamma rays aren’t? Shouldn’t they have become X rays after all that distance? Stephen WoodOrlando, Fla.